Current conduction in coaxial cable braids at radio frequencies

Results of braiding-factor measurements on two coaxial cables, one with a wire braid and the other with a tape braid, are reported here. The investigations, performed in an attempt to understand more clearly the mechanism of current conduction in the braided outer conductors of cables at radio frequencies, establish the existence of two different levels for the braiding factor at the higher and lower radio frequencies, respectively. The determinations of quantitative values for these levels are extremely dependent on the tolerances of braid dimensions. In the transition region between the two frequency limits braiding factors are found to be anomalous.